Biologically Inspired Underwater Propulsion Technology Using Coordinated Rowing of Multiple Propulsive Elements

Case ID:

2022-012

BACKGROUND

Numerous species of aquatic animals, ranging in size from several microns to a meter, swim underwater via coordinated, rhythmic paddling of multiple, closely spaced appendages. Studies have shown that natural coordinated appendage motion is realized by delaying the temporal and/or spatial paddling of one appendage relative to its neighbor. Long-tailed crustaceans such as krill, shrimp, and lobsters paddle their swimming limbs sequentially posterior (rear) to anterior (front). This coordinated movement of multiple, closely spaced appendages results in a metachronal wave propagating postero-anteriorly, in the same direction as the animal motion. It is possible this movement system could provide several advantages in the advancement of underwater and surface vehicles.

SUMMARY OF TECHNOLOGY

Researchers at OSU have developed a biologically-inspired underwater propulsion technology that uses coordinated rowing of multiple propulsive elements. The technology solves problems from previous designs to realize mechanical and electromechanical systems that more closely replicate the metachronal motion of multiple, closely spaced appendages (i.e., propulsive elements or propulsion). The novel multiple propulsor system presents advantages over other bio-inspired propulsion systems which replicate fins or jet-like propulsion. For example, the presence of multiple propulsors allow for a redundant operation capability in the event of propulsor damage or failure. Additionally, this system can be scaled for not only the number of propulsive elements, but across a broad range of sizes. Due to the multitude of elements generating propulsion and the design of the technology, many parameters can be controlled and tuned to allow for vastly different maneuvers/missions such as burst swimming or hovering. This technology has clear potential for propulsion systems of platforms such as unmanned underwater vehicles, autonomous underwater vehicles, remotely operated vehicles, and unmanned surface vehicles. The resulting advanced vehicular designs and functionalities can provide powerful tools to defense, oil and gas industry, as well as toys and educational kits.

POTENTIAL AREAS OF APPLICATION